The only geyser in the state of Pennsylvania is caused by pressure from an abandoned coal mine outside of the ghost town Centralia.

A touching tribute to the "Queen of Soul."

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

This incredible collection contains rare steam-powered engines, rides, and trains.

The cellar of a former factory is now home to a collection of gloves, machines, and tools of the trade.

From the 1940 Ford Coupe that started it all 50 years ago, this collection of over 150 classic vehicles celebrates the spirit and history of American car craft.

Play over 120 retro arcade games and pinball machines at this throwback museum.

For more than 25 years, this Philadelphia store has been offering a wide selection of Victorian oddities and antiques.

One of the oldest of its kind.

A layered tribute to the work of mosaicist Isaiah Zagar.

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

A museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.

Welcome to the home of the world's largest typewriter company.

This poured-concrete water reservoir is a gem of modernist architecture well-hidden in a city forest.

In 1912, a broken section of the reservoir wall released millions of gallons of water and destroyed many homes downhill.

A water reservoir disguised as a castle stands atop a hill in a park in Stockholm city.

A very uncommon water tank standing in the middle of the grapevines in Bordeaux nearly a century after its construction.

A statue of a Scottish cultural icon in central Sydney.

People can't get enough of these adorable Japanese photobooths.

A rare specimen of an iconic extinct animal in downtown Sydney.

The bones of this aquatic dinosaur turned to opal over the centuries and the beast's remains were almost sold as jewelry.

This rare effigy of the author spent years lost in storage.

A former drinking water storage reservoir transformed into a sunken garden.

Scotland's oldest purpose-built concert hall houses an incredible collection of ornate, centuries-old keyboards.